Rapid shutdown probably feels like old news at this point, but the product market is just now hitting its stride. Initially, the NEC 2017 and 2020 code changes directly favored the technology of certain module-level power electronic brands, and early versions of inverter-agnostic rapid shutdown devices that paired with string inverters were buggy, causing spikes, nuisance trips and a generally bad rep among installers. Thanks to some new players and advances in standardization and testing, that is now the old news. The rapid shutdown product landscape in 2021 offers a much wider selection of lower cost, inverter-agnostic options for installers to know about.SMA’s ShadeFix optimization produces more energy than traditional optimizers. ShadeFix also provides greater reliability and less service risk than alternatives.